1
0
mirror of https://github.com/hsoft/collapseos.git synced 2024-11-27 16:18:04 +11:00
collapseos/blk/754
Virgil Dupras 749fdf1b18 8086asm: add 8-bit JMP, MOVrI, INT,
Verified against nasm with equivalent code.
2020-06-12 11:29:00 -04:00

18 lines
473 B
Plaintext

( Place BEGIN, where you want to jump back and AGAIN after
a relative jump operator. Just like BSET and BWR. )
: BEGIN, PC ;
: BSET PC SWAP ! ;
( same as BSET, but we need to write a placeholder )
( : FJR, PC 0 A, ;
: IFZ, JRNZ, FJR, ;
: IFNZ, JRZ, FJR, ;
: IFC, JRNC, FJR, ;
: IFNC, JRC, FJR, ; )
: THEN,
DUP PC ( l l pc )
-^ ( l off )
( warning: l is a PC offset, not a mem addr! )
SWAP ORG @ + ( BIN( @ - ) ( off addr )
C! ;